The singerwasreportedlyseen checking out the sprawling triplex penthouse at12 East 13th St. The mod pad was first listed for $30.5 million in 2013, but has since been cut nearly in half to $18.5 million. It boasts amazing architectural details like a three-story, sloped wall of glass and a dramatic sculptural staircase, as well as luxury offerings including two massive terraces and two parking spots.